Benefits of Replacing Lead Acid/AGM Batteries With Lithium

For example, you need 25Ah to make it through the night. With a lead acid setup, you would need at least 50Ah of available capacity because lead acid batteries have only a 50% depth of discharge. With a lithium setup, you would only need about 30Ah of available capacity to make it through the night without any loss of power.

When it comes to AGMs and lead acid batteries vs lithium, lithium batteries will always be lighter, more powerful, and more efficient. Due to the problem with the depth of discharge, you will physically need more AGMs or lead acid batteries, which drastically increases weight.

Lithium batteries store much more energy pound-for-pound compared to the old type of batteries. This makes it so that lead acid and AMG systems get really heavy, really fast.

It's pretty common for modern RVs to have 400Ah or more of AGB battery capacity. This rating, however, is not exactly accurate. AGM batteries cannot be discharged any more than 50% without permanently damaging them. So that means the usable capacity is closer to 200Ah.

That means you can replace 4 AGM batteries with two smaller 100Ah lithium batteries without losing any available capacity.